Electricity Usage MonitorSimply plug the power meter between the device and a power outlet, then you can know exactly how much electricity is being used by individual items in the house. If you are trying to reduce your electricity bills, this handy gadget will definitely help! Functional and UsefulIt features a simple user interface with lots of information settings including power (W ), energy (kWh), current (A), voltage (V), power factor, cost, maximum power, minimum power, etc. to monitor home appliances power consumption. Overload AlarmOnce the load exceeds 16A or 3680W, there will be a flashing "OVERLOAD" icon on the screen, so you will know which device consumes a lot of energy, or if there is a problem. This helps a lot in ensuring electrical safety and minimizing loss. Backlit LCD DisplayThe power meter is built with a large backlit LCD digital display that can be seen from afar and is very easy to read in good light or in the dark. Battery Powered, Data StoredThe reader itself comes with a small battery which can store the information if you unplug the plug from the sector. Don't worry about losing your data.